@Lauren11 I was 43 at my first diagnosis; also a sizable lymph involved lobular tumour. That was nearly 17 years ago. I did have a local recurrence at the 10 year mark (there really is no point in sugar coating this shit) but I'm still here.
Chemo sucks for a week a month, rads are a lottery--you either cruise it or end up so resembling a roast chicken that you attract stray dogs-- and the hormone stuff is moderately horrible at first but you get used to it eventually.
Don't get too involved with the timeframes for treatment. That time would pass anyway. Just keep plodding forward. Mxx